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DS24B33+ Datasheet(PDF) 7 Page - Maxim Integrated Products

Part # DS24B33+
Description  4Kb 1-Wire EEPROM with 200k Write/Erase Cycles
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Manufacturer  MAXIM [Maxim Integrated Products]
Direct Link  https://www.maximintegrated.com/en.html
Logo MAXIM - Maxim Integrated Products

DS24B33+ Datasheet(HTML) 7 Page - Maxim Integrated Products

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4Kb 1-Wire EEPROM with
200k Write/Erase Cycles
_______________________________________________________________________________________
7
1ST
STAGE
2ND
STAGE
3RD
STAGE
4TH
STAGE
7TH
STAGE
8TH
STAGE
6TH
STAGE
5TH
STAGE
X0
X1
X2
X3
X4
POLYNOMIAL = X8 + X5 + X4 + 1
INPUT DATA
X5
X6
X7
X8
Figure 4. 1-Wire CRC Generator
32-BYTE INTERMEDIATE STORAGE SCRATCHPAD
ADDRESS
0000h to 001Fh
32-BYTE FINAL STORAGE EEPROM
PAGE 0
0020h to 003Fh
32-BYTE FINAL STORAGE EEPROM
PAGE 1
0040h to 01DFh
FINAL STORAGE EEPROM
PAGES 2 to 14
01E0h to 01FFh
32-BYTE FINAL STORAGE EPPROM
PAGE 15
Figure 5. Memory Map
The shift register bits are initialized to 0. Then, starting
with the LSB of the family code, one bit at a time is
shifted in. After the 8th bit of the family code has been
entered, the serial number is entered. After the last bit
of the serial number has been entered, the shift register
contains the CRC value. Shifting in the 8 bits of the
CRC returns the shift register to all 0s.
Memory
The DS24B33 EEPROM array (Figure 5) consists of 16
pages of 32 bytes each, starting at address 0000h and
ending at address 01FFh. In addition to the EEPROM,
the device has a 32-byte volatile scratchpad. Writes to
the EEPROM array are a two-step process. First, data
is written to the scratchpad and then copied into the
main array. The user can verify the data in the scratch-
pad prior to copying.


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